bank building 3d model

Create a fully functional, 3D-printable piggy bank as an STL file, shaped like a realistic bank building similar to a classical bank facade. The building must be hollow, suitable for storing coins, with a wall thickness of 2.5–3 mm. Add a rectangular coin slot on the roof. On the front facade, place a large round vault door design to visually represent a bank safe. The vault door does not need visible rotation but must clearly look like a bank vault. Above the vault, add raised text “Sparkasse”. Below it, include a flat blank plaque without any text. On the LEFT side of the building, add a tunnel boring machine drilling INTO the building (never outward). The drill head must point into the building wall. The tunnel boring machine is a separate solid part and visually acts as a “key”, but does not require complex internal gearing. The piggy bank must open from the BOTTOM using a simple, reliable threaded or twist-lock lid (not snap-fit). The opening must be secure so coins do not fal